Erwin has more than 20 years of experience in application development at complex corporate environments. He works in various roles including system development, project management and system architect roles. Erwin is experienced with with large corporate accounts, and has many years of experience working for international organizations. Today Erwin is focused on architectural design for solutions and infrastructures based upon SharePoint 2013 and Office 365. Since 2012 Erwin has been certified both as a Microsoft Certified Master: SharePoint 2010 and as a Microsoft Certified Solution Master: SharePoint. This makes him a member of a very unique community consisting of approximately 100 certified masters in the world. Erwin is a core team member of the Office 365 Developer Patterns and Practices team.